Dev tools · alternatives · 2026

24 alternatives to Pollux

Fake json data & json server mock API generator with JWT

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Pollux launched in 2021; newer entries below may have overtaken it.

1. 1
   Mock API Generator▲555

   Generate custom data & API to build apps in less than 30s

   2021 · retool.com · its alternatives →

2. 2
   Mockaroo▲354

   A realistic data generator to test your app

   2015 · mockaroo.com · its alternatives →

3. 3GJ
   Generate JSON mock data for testing/initial app development▲103

   Easily create complex JSON data structures using intuitive templates.

   2023 · jsongenerator.io · its alternatives →

4. 4
   JSON Generator▲139

   Create mock and sample JSON using a powerful template syntax

   2014 · json-generator.com · its alternatives →

5. 5
   Mock Turtle▲72

   GUI approach to generating realistic mock JSON data

   2022 · mockturtle.net · its alternatives →

6. 6
   FakeURL▲6

   Free online api mocking tool | mock api generator

   2025 · fakeurl.dev · its alternatives →

7. 7
   HTTP Mock – Intercept, debug and mock HTTP(S) with zero setup▲341

   Beautiful, cross-platform & open-source tools for debugging, testing and building with HTTP(S), on Windows, Linux & Mac.

   2019 · httptoolkit.tech · its alternatives →

8. 8
   JSON url▲119

   Mock backend with JSON generated from URL

   2022 · jsonurl.com · its alternatives →

9. 9
   AI-Powered Mock API Generator▲86

   Generate customized, realistic mock data & APIs, via GPT

   2023 · its alternatives →

10. 10
    JSONing Mock API▲6

    Free and open source fake API for testing and prototyping

    Nov 2025 · jsoning.com · its alternatives →

11. 11CM
    Creating mock data using TypeScript interfaces▲57

    2023 · butlermock.online · its alternatives →

12. 12
    Mockoon – mock REST APIs in seconds▲68

    Mockoon is the easiest and quickest way to run mock REST API servers. No remote deployment, no account required, free, open source and cross-platform.

    2017 · mockoon.com · its alternatives →

13. 13
    Mocktail – Free, open-source mock API server with a built-in dashboard▲25

    Hi HN, I built the first version of Mocktail years ago. I recently came back to the project, and after a pretty substantial rebuild, v4 is now out. Mocktail is a free and open-source, self-hosted mock API server with a built-in dashboard and database, packaged as a single ~25 MB binary. You can run it locally or on your own infrastructure — no account or hosted service required. You can define endpoints and responses, generate realistic data per request, customize headers, status codes and latency, and inspect incoming requests in real time. With v4, I also added MCP support, so coding…

    Aug 2026 · getmocktail.com · its alternatives →

14. 14
    Mock API Generator▲17

    API Mocks Prototyping

    2020 · mock-api-builder.vercel.app · its alternatives →

15. 15
    Data Populator▲149

    Sketch and XD plugin to populate mockups with real data.

    2019 · datapopulator.com · its alternatives →

16. 16
    Mocklets▲82

    A HTTP-based API simulator to assist parallel development 🛠️

    2018 · mocklets.com · its alternatives →

17. 17
    My first open-source project release – RandomJson▲56

    Provides a Kotlin/Java library to create a random json string - mangatmodi/RandomJson

    2019 · github.com · its alternatives →

18. 18
    MockThis▲80

    Generate mock data using AI

    2023 · its alternatives →

19. 19
    FakeJSON▲6

    A realistic test data API to make or break your app

    2018 · its alternatives →

20. 20
    Generate JSON▲77

    AI-generated dummy JSON - deploy in seconds

    2023 · jsonviewer.stack.hu · its alternatives →

21. 21
    Fake.REST▲5

    Online JSON mock API server with dynamic response templates

    2019 · its alternatives →

22. 22
    Fake API for Devs▲8

    Free mock api generator for developers | instant test data

    Nov 2025 · fakeapifordevs.vercel.app · its alternatives →

23. 23
    Mock Maker▲93

    Effortless mock APIs for seamless testing & prototyping

    2024 · its alternatives →

24. 24
    Mockingjay – Fake servers and consumer-driven contracts▲39

    Fake server, Consumer Driven Contracts and help with testing performance from one configuration file with zero system dependencies and no coding whatsoever - quii/mockingjay-server

    2015 · github.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →